If 0.750 mol of liquid CS 2 reactsstoichiometrically according to the balanced e

Question

If 0.750 mol of liquid CS2 reactsstoichiometrically according to the balanced equation, how manyliters of gaseous Cl2 measured at STP arerequired?

CS2(l) + 3Cl2(g) CCl4(l) +S2Cl2(l)


Molar Mass (g/mol) CS2 76.143 Cl2 70.906 Density (g/mL) CS2 1.26 Molar Volume (L) 22.4 at STP Gas Constant
(L.atm.mol-1.K-1) 0.0821

If 0.750 mol of liquid CS2 reactsstoichiometrically according to the balanced equation, how manyliters of gaseous Cl2 measured at STP arerequired?

CS2(l) + 3Cl2(g) CCl4(l) +S2Cl2(l)


Molar Mass (g/mol) CS2 76.143 Cl2 70.906 Density (g/mL) CS2 1.26 Molar Volume (L) 22.4 at STP Gas Constant
(L.atm.mol-1.K-1) 0.0821

Explanation / Answer

According to the equation, 3 moles of chlorine gas are needed forevery mole of CS2, so .750 mol x 3 of Cl2 isneeded. Because it is given that the systems is done at STP (1 atm ofpressure, and 273 K), we can assume that there are 22.4 L ofgaseous Cl2 per mole. Answer: moles Cl2 x 22.4 L/mol

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